A built-in fastening connection assembly for vertical connection of hollow square tubes

Abstract

The application belongs to the technical field of building material installation, and particularly relates to a built-in fastening connecting assembly for vertical connection of hollow square tubes, which comprises an inner lining fixed anchor plate, a fastening assembly and a plurality of connecting bolts, the fastening assembly comprises a bolt fastening block, a fastening bolt, a sliding wedge and two expansion wedges, the inner lining fixed anchor plate is provided with connecting bolt threaded holes and fastening bolt adjusting through holes, the bolt fastening block is provided with fastening bolt limiting through holes and connecting bolt limiting through holes, the sliding wedge is in the shape of a cuboid with one end large and the other end small, and the sliding wedge is provided with a fastening bolt threaded hole, and the two faces of the two expansion wedges that are close to each other are inclined faces with the same inclination and capable of being butted against the two faces of the sliding wedge that are opposite to the two faces, and the two faces of the two expansion wedges that are far away from each other are straight faces. The hollow square tubes are connected vertically through the ingenious structure setting and installation mode, the installation process is fast and safe, the surface of the square tube combination is flat after installation, and the square tube combination can be disassembled.

Description

Technical Field

[0001] This invention belongs to the field of building material installation technology, specifically relating to a built-in fastening connection component for vertical connection of hollow square tubes. Background Technology

[0002] In the field of building material installation technology, it is common to encounter situations where two square tubes need to be connected together to form shelves or bookshelves. Currently, the most common methods are welding or using external splicing components. Welding requires power, welding equipment, and professional welders, and it produces unpleasant odors. Therefore, welding is inconvenient and environmentally unfriendly when needed urgently. This is especially true for connections between square tubes where the connection strength requirement is not high or where disassembly is needed after installation; welding also makes disassembly inconvenient. Using external splicing components to connect square tubes results in uneven surfaces on the shelves or bookshelves, affecting aesthetics and hindering subsequent use. Therefore, there is an urgent need for a square tube connection method that is easy to disassemble, safe, environmentally friendly, and produces a smooth finish after assembly. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a built-in fastening connection assembly for vertical connection of hollow square tubes.

[0004] This invention is implemented as follows: a built-in fastening connection assembly for vertical connection of hollow square tubes is provided, including an inner lining fixing anchor plate, a fastening assembly and several connecting bolts. The fastening assembly includes a bolt fastening block, fastening bolts, a sliding wedge block and two expansion wedge blocks. The inner lining fixing anchor plate is provided with threaded holes for connecting bolts and adjusting through holes for fastening bolts, which are the same number as the number of connecting bolts. The bolt fastening block is provided with a limiting through hole for fastening bolts and a limiting through hole for connecting bolts, which are the same number as the number of connecting bolts. The sliding wedge block is a cubic shape with one end larger than the other, and is provided with threaded holes for fastening bolts. The two sides of the two expansion wedge blocks that are close to each other are inclined surfaces with the same slope as the two sides opposite to the sliding wedge block and can be joined together, while the two sides that are far apart from each other are straight surfaces. When the hollow square tubes are vertically connected, the inner lining fixing anchor plate is located in one square tube, and the fastening bolt passes through the fastening bolt limiting through hole and is movably engaged in the bolt fastening block; the connecting bolt passes through the connecting bolt limiting through hole, is movably engaged in the bolt fastening block, and then passes through the preset opening on the square tube to be threadedly connected to the connecting bolt threaded hole on the inner lining fixing anchor plate; then the fastening bolt is threadedly connected to the fastening bolt threaded hole on the sliding wedge; one end of the two expansion wedges is pressed against the bolt fastening block, and the two inclined parts are attached to the two inclined surfaces of the sliding wedge; the other square tube is inserted into the assembled fastening assembly; the fastening bolt is rotated to bring the distance between the sliding wedge and the bolt fastening block closer, and the distance between the two expansion wedges increases accordingly, tightly abutting against the tube wall of the square tube, thus realizing the vertical connection of the two hollow square tubes.

[0005] Preferably, the number of connecting bolts is four, the adjusting through hole of the fastening bolt is located in the center of the inner lining fixing anchor plate, and the threaded hole of the connecting bolt surrounds the adjusting through hole of the fastening bolt.

[0006] Preferably, the inner lining fixing anchor plate has a chamfered slope of ≤45° around its perimeter.

[0007] Preferably, the bolt fastening block is cubic in shape, and the maximum outer diameter of the bolt fastening block matches the inner diameter of the square tube being connected.

[0008] Preferably, the two straight surfaces of the two expansion wedges that are far apart from each other are rough surfaces.

[0009] Preferably, the end of the fastening bolt away from the sliding wedge is provided with a fastening bolt nut, and the shape of the fastening bolt limiting hole matches the shape of the fastening bolt; the end of the connecting bolt away from the inner lining fixing anchor plate is provided with a connecting bolt nut, and the shape of the connecting bolt limiting hole matches the shape of the connecting bolt.

[0010] Further preferably, both ends of the fastening bolt are provided with wrench adjustment holes on their inner sides; the connecting bolt is provided with a wrench adjustment hole on the inner side of the end where the connecting bolt nut is located.

[0011] Compared with the prior art, the advantages of the present invention are as follows: This invention provides a built-in fastening connection assembly for vertical connection of hollow square tubes. Through a cleverly designed structural design and installation method, two or more hollow square tubes can be vertically assembled. The installation process is quick and safe, and the assembled square tubes have a flat surface after installation. Furthermore, they can be disassembled as needed. Attached Figure Description

[0012] Figure 1 This is an overall assembly diagram of the built-in fastening connection assembly provided by the present invention; Figure 2An exploded view of the built-in fastening connection assembly provided by the present invention from one angle; Figure 3 Another exploded view of the built-in fastening connection assembly provided by the present invention; Figure 4 Diagram of the inner lining fixing anchor plate structure; Figure 5 This is an installation diagram illustrating the process of joining two square tubes together using the built-in fastening connection assembly provided by this invention. Figure 6 A schematic diagram of the cross-section of the anchor plate used to fix the inner lining; Figure 7 This is a schematic diagram showing the state of three square tubes connected by the built-in fastening connection assembly provided by the present invention. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0014] refer to Figures 1-4 This invention provides an internal fastening connection assembly for vertical connection of hollow square tubes, including an inner lining fixing anchor plate 1, a fastening assembly 2, and a number of connecting bolts 3. The fastening assembly 2 includes bolt fastening blocks 21, fastening bolts 22, sliding wedges 23, and two expansion wedges 24. The inner lining fixing anchor plate 1 is provided with connecting bolt threaded holes 11 and fastening bolt adjustment through holes 12, which are the same number as the number of connecting bolts 3. The bolt fastening blocks 21 are provided with fastening bolt limiting through holes 25 and connecting bolt limiting through holes 26, which are the same number as the number of connecting bolts 3. The sliding wedges 23 are cubic in shape with one end larger than the other, and are provided with fastening bolt threaded holes 28. The two faces of the two expansion wedges 24 that are close to each other are inclined surfaces with the same slope as the two faces opposite to the sliding wedges 23 and can be joined together, while the two faces that are far apart from each other are straight surfaces. The vertical connection of hollow square tubes includes the following steps: 1) On the side wall of a square tube, a through hole corresponding to the threaded hole 11 of the connecting bolt and the adjusting through hole 12 of the fastening bolt is pre-drilled; 2) When the hollow square tubes are vertically connected, the inner lining fixing anchor plate 1 is located in one square tube, and the fastening bolt 22 passes through the fastening bolt limiting through hole 25 and is movably locked in the bolt fastening block 21; 3) The connecting bolt 3 passes through the connecting bolt limiting hole 26, is movably engaged in the bolt fastening block 21, and then passes through the preset opening on the square tube to be threadedly connected to the connecting bolt threaded hole 11 on the inner lining fixing anchor plate 1. 4) Then connect the fastening bolt 22 to the fastening bolt thread hole 28 on the sliding wedge 23. The maximum outer diameter of the sliding wedge 23 is smaller than the inner diameter of the square tube being fastened. 5) Place one end (larger end, flat) of the two expansion wedges 24 against the bolt fastening block 21, and place the two inclined surfaces against the two inclined surfaces of the sliding wedge 23. When the expansion wedges 24 and the sliding wedges 23 are not pulled close to their farthest distance, place them side by side. The overall size is smaller than the inner diameter of the square tube to be fastened. After installing the fastening assembly 2, insert the square tube to be fastened into the assembled fastening assembly 2. 6) Pass the wrench through the through hole and the adjusting through hole 12 on the square tube to rotate and adjust the adjusting bolt 22. This brings the sliding wedge 23 closer to the bolt fastening block 21, increasing the distance between the two expansion wedges 24, which then tightly abut against the tube wall of the square tube, achieving a vertical connection between the two hollow square tubes. (Refer to...) Figure 5 .

[0015] Preferably, the number of connecting bolts 3 is four, the fastening bolt adjusting through hole 12 is located in the center of the inner lining fixing anchor plate 1, and the connecting bolt threaded hole 11 surrounds the fastening bolt adjusting through hole 12.

[0016] To increase versatility, the inner lining anchor plate 1 has a chamfered edge slope of ≤45° around its perimeter. In this embodiment, the chamfered edge slope is preferably set to 45° (reference). Figure 6 This ensures that multiple connections can be made (e.g., three, see reference). Figure 7 In the case of square tubes, each inner lining fixing anchor plate 1 can be placed close to the tube wall in different directions at the same length position inside the same square tube wall, without interfering with each other.

[0017] Preferably, the bolt fastening block 21 is cubic in shape, and the maximum outer diameter of the bolt fastening block 21 matches the inner diameter of the square tube being connected. This ensures that when the square tube is inserted into the assembled fastening assembly 2, the square tube can be positioned at a flat angle without significant positional deviation.

[0018] To increase the strength of the connection, as an improvement to the technical solution, the two straight surfaces of the two expansion wedges 24 that are far apart from each other are rough surfaces.

[0019] As a movable limiting and locking method for fastening bolt 22 and connecting bolt 3 within bolt fastening block 21, the end of fastening bolt 22 away from sliding wedge block 23 is provided with fastening bolt nut, and the shape of fastening bolt limiting through hole 25 matches the shape of fastening bolt 22; the end of connecting bolt 3 away from inner lining fixing anchor plate 1 is provided with connecting bolt nut, and the shape of connecting bolt limiting through hole 26 matches the shape of connecting bolt 3.

[0020] That is, one end of the fastening bolt 22 is a nut, and the fastening bolt limiting through hole 25 has a nut groove that matches the nut. In this case, when the fastening bolt 22 is inserted into the fastening bolt limiting through hole 25, the nut is precisely locked in the groove. The same applies to the connecting bolt 3.

[0021] To facilitate adjustment of the fastening bolt 22 and the connecting bolt 3, both ends of the fastening bolt 22 are provided with wrench adjustment holes; the connecting bolt 3 is provided with a wrench adjustment hole on the inner side of the end where the connecting bolt nut is located.

Claims

1. A built-in fastening connection assembly for vertical connection of hollow square tubes, characterized in that, The assembly includes an inner lining anchor plate (1), a fastening component (2), and several connecting bolts (3). The fastening component (2) includes a bolt fastening block (21), a fastening bolt (22), a sliding wedge (23), and two expansion wedges (24). The inner lining anchor plate (1) is provided with a number of connecting bolt thread holes (11) and a fastening bolt adjustment through hole (12) that are the same as the number of connecting bolts (3). The bolt fastening block (21) is provided with a fastening bolt limiting through hole (25) and a number of connecting bolt limiting through holes (26) that are the same as the number of connecting bolts (3). The sliding wedge (23) is a cube shape with one end larger than the other, and a fastening bolt thread hole (28) is provided on the sliding wedge (23). The two faces of the two expansion wedges (24) that are close to each other are inclined surfaces with the same slope as the two faces opposite to the sliding wedge (23) and can be joined together. The two faces that are far apart from each other are straight surfaces. When the hollow square tubes are vertically connected, the inner lining fixing anchor plate (1) is located in one square tube, the fastening bolt (22) passes through the fastening bolt limiting through hole (25) and is movably locked in the bolt fastening block (21); the connecting bolt (3) passes through the connecting bolt limiting through hole (26) and is movably locked in the bolt fastening block (21), and then passes through the preset opening on the square tube to be threadedly connected to the connecting bolt threaded hole (11) on the inner lining fixing anchor plate (1); then the fastening bolt (22) is connected to the sliding wedge (23) on the fastening bolt (22). The bolt thread hole (28) is threaded; one end of the two expansion wedges (24) is pressed against the bolt fastening block (21), and the two inclined parts are attached to the two inclined surfaces of the sliding wedge (23). The other square tube is inserted into the assembled fastening assembly (2); the fastening bolt (22) is rotated to bring the distance between the sliding wedge (23) and the bolt fastening block (21) closer. The distance between the two expansion wedges (24) increases accordingly and they are tightly pressed against the tube wall of the square tube, realizing the vertical connection of the two hollow square tubes.

2. The built-in fastening connection assembly for vertical connection of hollow square tubes according to claim 1, characterized in that, The number of connecting bolts (3) is four, the fastening bolt adjustment through hole (12) is located in the center of the inner lining fixing anchor plate (1), and the connecting bolt thread hole (11) surrounds the fastening bolt adjustment through hole (12).

3. The built-in fastening connection assembly for vertical connection of hollow square tubes according to claim 1, characterized in that, The inner lining fixing anchor plate (1) has a chamfered slope of ≤45° around its perimeter.

4. The built-in fastening connection assembly for vertical connection of hollow square tubes according to claim 1, characterized in that, The bolt fastening block (21) is cubic in shape, and the maximum outer diameter of the bolt fastening block (21) matches the inner diameter of the square tube being connected.

5. The built-in fastening connection assembly for vertical connection of hollow square tubes according to claim 1, characterized in that, The two straight surfaces of the two expansion wedges (24) that are far apart from each other are rough surfaces.

6. The built-in fastening connection assembly for vertical connection of hollow square tubes according to claim 1, characterized in that, The fastening bolt (22) has a fastening bolt nut at one end away from the sliding wedge (23), and the shape of the fastening bolt limiting through hole (25) matches the shape of the fastening bolt (22); the connecting bolt (3) has a connecting bolt nut at one end away from the inner lining fixing anchor plate (1), and the shape of the connecting bolt limiting through hole (26) matches the shape of the connecting bolt (3).

7. The built-in fastening connection assembly for vertical connection of hollow square tubes according to claim 6, characterized in that, Both ends of the fastening bolt (22) are provided with wrench adjustment holes on the inner side; the connecting bolt (3) is provided with a wrench adjustment hole on the inner side of the end where the connecting bolt nut is located.

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